Heat pen

Recorders – Thermal recording

Patent

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Details

346139C, 401 2, 219237, G01D 1510, H05B 100

Patent

active

047588462

ABSTRACT:
A heat pen comprising a first tube, a holder tube coiled with resistance wire and a metallic cylinder as a stylus. When the resistance wire is charged with electricity the metallic cylinder is heated to mark heat-sensitive recording paper. When the metallic cylinder is worn down by extensive usage, it is readily removed and replaced by a fresh metallic cylinder.

REFERENCES:
patent: 2474312 (1949-06-01), Halpern
patent: 2955895 (1960-10-01), Buoymaster et al.
patent: 3811030 (1974-05-01), Veach
patent: 3969025 (1976-07-01), Brodie
patent: 3969606 (1976-07-01), Veach
patent: 4269343 (1981-05-01), Siegel et al.
patent: 4328920 (1982-05-01), Vella
patent: 4435636 (1984-03-01), Royston
patent: 4439667 (1984-03-01), Sylvia
Drawing of a heated pen assembly, Kenemetrics, Inc., VR-2, 104995B.
Replacement Heat Writing Stylus Model #3197B by Teledyne Geotech of Dallas, Texas.
Brochure "MEQ-800 Microearthquake System", by Sprengnether Instruments, Inc., undated.
Brochure "Portacorder", Model RV-320, by Teledyne Geotech of Dallas, Texas, undated, and Price List dated Mar. 1, 1983 (D).
Brochure "Helicorder", Model RV-301B, by Teledyne Geotech of Dallas, Texas, Aug. 1978//A-0593, Helicorder & Accessories, Aug. 1978/1363 and Price List dated Mar. 1, 1983.

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